Effects of rotor structure on performance of small size axial flow fans

作     者：Pin Liu Yingzi Jin Yanping Wang 

作者机构：Laboratory of Fluid Transmission and Application Zhejiang Sci-Tech University Hangzhou 310018 China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2011年第20卷第3期

页      面：205-210页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：The author acknowledges the support of Zhejiang Provincial Natural Science Foundation (No.R107635) Zhejiang Provincial Key Science Foundation (2008 C11027) National Natural Science Foundation of China (No.50735004) 

主　　题：axial flow fan counter-rotating eddy current noise 

摘      要：Small size axial flow fans are used as a cooling component for computers,electronic equipment and other electronic *** the increasing power of electrical equipment,the demand for lower noise and higher ventilation of cooling fan is also *** methods of improving ventilation by raising the fan s rotation speed causes a decrease in efficiency and an increase in *** this paper,different structures of fans were simulated,and as a result,the counter-rotating fan can achieve higher pressure,efficiency and facilitate ventilation in a smaller ***,some other conclusions are as follows:(1) Higher pressure rise can be obtained by a counter-rotating fan than by the two-stage rotor fan in the same axial ***,the counter-rotating fan has a broader work scope.(2) The main noise type of the counter-rotating fan is rotating noise;the small peak pulse caused by vortex noise mainly due to the eddy current produced by small eddies.(3) When the distance of counter-rotating fans is smaller than 2 times the chord,the greater distance the greater total pressure of the circum-averages and along the axial direction,the total pressure begin to decline until the distance is three times the chord,so there is an optimal distance between *** simulation results are of important significance to the quantitative analysis and optimization design of the counter-rotating fan.